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Composite mimetic enzyme gel for degrading organic pollutants and its preparation method and application

A technology for organic pollutants and composite simulation, which is applied in the field of composite simulated enzyme gel for degrading organic pollutants and its preparation, which can solve the problems of complex analytical methods, high difficulty, long cycle, etc., and achieves efficient degradation and cheap materials. , the effect of structural stability

Active Publication Date: 2022-02-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the large difference in soil properties and the slow migration of pollutants in the soil, the distribution of pollutants in the soil is uneven and the spatial difference is large
Compared with the atmosphere and water bodies, the cost of soil pollution control is high, the cycle is long, and it is difficult
If you want to separate the pollutants from the soil, you need more complex analysis methods to reduce the combination of pollutants and soil, and then separate the pollutants from the soil by leaching and other means, which requires a lot of financial and material resources.
It also requires a long management cycle

Method used

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  • Composite mimetic enzyme gel for degrading organic pollutants and its preparation method and application
  • Composite mimetic enzyme gel for degrading organic pollutants and its preparation method and application
  • Composite mimetic enzyme gel for degrading organic pollutants and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dissolve L-arginine (Arg) in deionized water to make a 1mol / L arginine solution, add acid to adjust the pH to 7, add an equal volume of copper chloride solution (0.5mol / L) dropwise, and continue Adjust the pH to about 7 and stir for 1 h, then freeze-dry the product after washing several times to obtain the simulated enzyme—arginine-coordinated copper (Arg-Cu) product; 2 The mass fraction is 30%, the particle size is 20nm, and the pH is 8.5 alkaline silica sol, add simulated enzyme, make the enzyme and SiO 2 The mass ratio is 1:500. After stirring and dissolving, adjust the pH to 5 with water, and age at 60° C. for 2 hours to obtain a composite gel with degradation function. The composite gel has been tested by BET, and the specific surface area is 191m 2 / g, the pore size is 1.04nm, configure 50μg / ml methylene blue solution as the degradation test object, add H to the methylene blue solution 2 o 2 , such that H 2 o 2 The concentration is 50mmol / l, and 200g of the ...

Embodiment 2

[0033] Dissolve L-arginine (Arg) in deionized water to make a 1mol / L arginine solution, add acid to adjust the pH to 7, add an equal volume of copper chloride solution (1mol / L) dropwise, and continue to adjust The pH is about 7 and stirred for 8 hours, and then the product is freeze-dried after washing several times to obtain the simulated enzyme-arginine-coordinated copper (Arg-Cu) product; to the prepared SiO 2 The mass fraction is 30%, the particles are 20nm, and the pH is 8.5 alkaline silica sol, adding simulated enzymes, so that the enzymes and SiO 2 The mass ratio is 1:50. After stirring and dissolving, adjust the pH to 7 with acid, and age at 60°C for 12 hours to obtain a composite gel with degradation function. The composite gel has been tested by BET, and the specific surface area is 320m 2 / g, the pore size is 6.08nm, configure 50μg / ml methylene blue solution as the degradation test object, add H to the methylene blue solution 2 o 2 , such that H 2 o 2 The conc...

Embodiment 3

[0035]Dissolve L-leucine (Leu) in deionized water to make a 1mol / L leucine solution, add acid to adjust the pH to 7, add an equal volume of copper chloride solution (0.5mol / L) dropwise, and continue Adjust the pH to about 7 and stir for 1 h, then freeze-dry the product after washing several times to obtain the simulated enzyme——leucine-coordinated copper (Leu-Cu) product; 2 The mass fraction is 20%, and the particles are added with simulated enzymes in 20nm, acidic silica sol with a pH of 2, so that the enzymes and SiO 2 The mass ratio is 1:500. After stirring and dissolving, adjust the pH to 5 with acid, and age at 60°C for 2 hours to obtain a composite gel with degradation function. The composite gel has been tested by BET, and the specific surface area is 179m 2 / g, the pore size is 1.01nm, configure 50μg / ml methylene blue solution as the degradation test object, add H to the methylene blue solution 2 o 2 , such that H 2 o 2 The concentration is 50mmol / l, and 200g of ...

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Abstract

The invention relates to a composite simulated enzyme gel for degrading organic pollutants and its preparation method and application. The method comprises the following steps: (1) dissolving amino acid in deionized water to form an amino acid solution, adding acid to adjust pH=6.5 -7.5, add an equal volume of copper ion solution drop by drop, continue to adjust the pH=6.5-7.5 and stir, after washing several times, freeze-dry the product to obtain simulated enzyme; Add simulated enzymes to the mixture to obtain a mixed solution; adjust pH=3.5-7.5 after stirring and dissolving, and age to obtain a composite simulated enzyme gel containing mesoporous or micropores for degrading organic pollutants, and used to degrade phenols and / or phenols in the environment or dye-like organic pollutants. Compared with the prior art, the present invention controls the speed of enzyme degradation by adjusting the pore size without causing additional pollution to the environment, so as to achieve long-term, stable and efficient degradation effects, and has a good application prospect.

Description

technical field [0001] The invention relates to the field of environmental maintenance, in particular to a composite mimetic enzyme gel for degrading organic pollutants and a preparation method and application thereof. Background technique [0002] With the rapid and stable development of my country's economy, some environmental problems have also begun to emerge. Pollutants produced by human activities enter the soil and accumulate to a certain extent, causing soil quality to deteriorate. When there are too many harmful substances in the soil and exceed the self-purification capacity of the soil, the composition, structure and function of the soil will change, and microbial activities will be affected. Inhibition, harmful substances or their decomposition products gradually accumulate in the soil and are indirectly absorbed by the human body through "soil→plant→human body" or "soil→water→human body". Soil pollution will lead to reduced crop yields and reduced quality of ag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C02F1/72C02F101/38C02F101/30C02F101/34
CPCB01J35/0013B01J31/2243C02F1/725C02F1/722C02F2101/40C02F2305/023C02F2101/345C02F2101/308C02F2101/30
Inventor 高国华薛胜清范语婷王启刚吴广明王霞沈军封臣
Owner TONGJI UNIV
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